The Skegness HST started in Summer 2009 I believe with 2 round trips starting from Nottingham. This was cut back to a single round trip in 2010 and started from Derby. I remember riding on a round trip from Skegness in 2009, and it was a 30mph stagger all the way from Skegness to Boston, with a couple of 5mph restrictions over some bridges. When I saw a HST on the branch at Havenhouse last year, it passed at linespeed (50mph), so the 30mph restriction for locos has at least been removed in places (or may be just a case for HST's). This year could see the whole line being back up to linespeed thanks to the track renewals.